./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:33:59,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:33:59,102 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:33:59,118 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:33:59,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:33:59,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:33:59,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:33:59,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:33:59,149 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:33:59,150 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:33:59,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:33:59,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:33:59,152 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:33:59,152 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:33:59,154 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:33:59,154 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:33:59,154 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:33:59,155 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:33:59,155 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:33:59,155 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:33:59,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:33:59,159 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:33:59,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:33:59,160 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:33:59,160 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:33:59,160 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:33:59,161 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:33:59,161 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:33:59,161 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:33:59,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:33:59,162 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:33:59,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:33:59,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:33:59,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:33:59,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:33:59,163 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:33:59,163 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:33:59,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:33:59,163 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:33:59,164 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:33:59,164 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:33:59,166 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:33:59,166 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2024-10-11 14:33:59,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:33:59,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:33:59,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:33:59,454 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:33:59,454 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:33:59,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-10-11 14:34:00,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:34:01,077 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:34:01,077 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-10-11 14:34:01,085 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2bedd2756/1de02883a70046548d1a53b1f0698282/FLAGc6906b3e4 [2024-10-11 14:34:01,096 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2bedd2756/1de02883a70046548d1a53b1f0698282 [2024-10-11 14:34:01,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:34:01,101 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:34:01,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:34:01,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:34:01,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:34:01,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1293c468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01, skipping insertion in model container [2024-10-11 14:34:01,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,137 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:34:01,336 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2473,2486] [2024-10-11 14:34:01,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:34:01,355 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:34:01,387 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2473,2486] [2024-10-11 14:34:01,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:34:01,418 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:34:01,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01 WrapperNode [2024-10-11 14:34:01,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:34:01,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:34:01,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:34:01,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:34:01,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,453 INFO L138 Inliner]: procedures = 23, calls = 22, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2024-10-11 14:34:01,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:34:01,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:34:01,454 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:34:01,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:34:01,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,471 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,490 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:34:01,490 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,504 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,508 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:34:01,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:34:01,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:34:01,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:34:01,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (1/1) ... [2024-10-11 14:34:01,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:34:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:01,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:34:01,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:34:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:34:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:34:01,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:34:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:34:01,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:34:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:34:01,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:34:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:34:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:34:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:34:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:34:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:34:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:34:01,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:34:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:34:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:34:01,595 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:34:01,686 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:34:01,688 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:34:01,948 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:34:01,948 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:34:02,231 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:34:02,232 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 14:34:02,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:34:02 BoogieIcfgContainer [2024-10-11 14:34:02,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:34:02,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:34:02,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:34:02,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:34:02,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:34:01" (1/3) ... [2024-10-11 14:34:02,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d5b689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:34:02, skipping insertion in model container [2024-10-11 14:34:02,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:34:01" (2/3) ... [2024-10-11 14:34:02,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d5b689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:34:02, skipping insertion in model container [2024-10-11 14:34:02,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:34:02" (3/3) ... [2024-10-11 14:34:02,244 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2024-10-11 14:34:02,262 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:34:02,263 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:34:02,263 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:34:02,320 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 14:34:02,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2024-10-11 14:34:02,383 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-11 14:34:02,383 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:34:02,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-11 14:34:02,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2024-10-11 14:34:02,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2024-10-11 14:34:02,403 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:34:02,412 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fde983b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:34:02,413 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:34:02,428 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:34:02,428 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-10-11 14:34:02,428 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 14:34:02,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:02,430 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:02,431 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:02,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:02,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1732159752, now seen corresponding path program 1 times [2024-10-11 14:34:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938870092] [2024-10-11 14:34:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:02,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938870092] [2024-10-11 14:34:02,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938870092] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:34:02,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:34:02,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:34:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857852843] [2024-10-11 14:34:02,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:02,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:34:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:34:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:34:02,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:02,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:02,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:02,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:02,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:03,132 INFO L124 PetriNetUnfolderBase]: 200/296 cut-off events. [2024-10-11 14:34:03,132 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-11 14:34:03,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 296 events. 200/296 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 689 event pairs, 124 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 534. Up to 295 conditions per place. [2024-10-11 14:34:03,141 INFO L140 encePairwiseOnDemand]: 24/27 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-10-11 14:34:03,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 112 flow [2024-10-11 14:34:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:34:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:34:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-10-11 14:34:03,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-11 14:34:03,180 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 36 transitions. [2024-10-11 14:34:03,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 112 flow [2024-10-11 14:34:03,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 14:34:03,187 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 64 flow [2024-10-11 14:34:03,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-10-11 14:34:03,192 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-10-11 14:34:03,192 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 64 flow [2024-10-11 14:34:03,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:03,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:03,192 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:03,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:34:03,193 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:03,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -776271565, now seen corresponding path program 1 times [2024-10-11 14:34:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:03,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491807436] [2024-10-11 14:34:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:03,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491807436] [2024-10-11 14:34:03,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491807436] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:34:03,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:34:03,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:34:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461062954] [2024-10-11 14:34:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:03,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:34:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:34:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:34:03,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:03,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:03,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:03,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:03,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:03,817 INFO L124 PetriNetUnfolderBase]: 387/568 cut-off events. [2024-10-11 14:34:03,819 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-11 14:34:03,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 568 events. 387/568 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1771 event pairs, 124 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1156. Up to 352 conditions per place. [2024-10-11 14:34:03,824 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 35 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2024-10-11 14:34:03,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 183 flow [2024-10-11 14:34:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:34:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:34:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-10-11 14:34:03,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-10-11 14:34:03,828 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 64 flow. Second operand 3 states and 52 transitions. [2024-10-11 14:34:03,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 183 flow [2024-10-11 14:34:03,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 179 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:34:03,830 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 86 flow [2024-10-11 14:34:03,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-10-11 14:34:03,831 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2024-10-11 14:34:03,832 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 86 flow [2024-10-11 14:34:03,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:03,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:03,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:03,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:34:03,833 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:03,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2008208866, now seen corresponding path program 1 times [2024-10-11 14:34:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:03,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810872570] [2024-10-11 14:34:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:03,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:04,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810872570] [2024-10-11 14:34:04,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810872570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:04,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511448091] [2024-10-11 14:34:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:04,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:04,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:04,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:34:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:04,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:34:04,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:04,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511448091] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:04,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:04,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-11 14:34:04,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143185698] [2024-10-11 14:34:04,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:04,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:34:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:34:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:34:04,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:04,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 86 flow. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:04,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:04,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:04,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:04,697 INFO L124 PetriNetUnfolderBase]: 705/1058 cut-off events. [2024-10-11 14:34:04,698 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-10-11 14:34:04,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2541 conditions, 1058 events. 705/1058 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3895 event pairs, 397 based on Foata normal form. 50/1108 useless extension candidates. Maximal degree in co-relation 1376. Up to 567 conditions per place. [2024-10-11 14:34:04,706 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 54 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-10-11 14:34:04,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 61 transitions, 311 flow [2024-10-11 14:34:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:34:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:34:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-10-11 14:34:04,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-10-11 14:34:04,709 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 86 flow. Second operand 6 states and 78 transitions. [2024-10-11 14:34:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 61 transitions, 311 flow [2024-10-11 14:34:04,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 61 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:34:04,712 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 128 flow [2024-10-11 14:34:04,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-10-11 14:34:04,713 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2024-10-11 14:34:04,713 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 128 flow [2024-10-11 14:34:04,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:04,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:04,714 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:04,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:04,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:04,918 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:04,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1683592086, now seen corresponding path program 1 times [2024-10-11 14:34:04,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:04,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295760081] [2024-10-11 14:34:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:05,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:05,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295760081] [2024-10-11 14:34:05,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295760081] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:05,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933439589] [2024-10-11 14:34:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:05,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:05,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:05,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:05,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:34:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:05,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:34:05,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:05,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933439589] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:05,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:05,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-11 14:34:05,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877220798] [2024-10-11 14:34:05,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:05,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:34:05,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:34:05,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:34:05,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:05,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:05,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:05,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:05,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:05,515 INFO L124 PetriNetUnfolderBase]: 611/932 cut-off events. [2024-10-11 14:34:05,516 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2024-10-11 14:34:05,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 932 events. 611/932 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3429 event pairs, 379 based on Foata normal form. 38/970 useless extension candidates. Maximal degree in co-relation 1468. Up to 567 conditions per place. [2024-10-11 14:34:05,522 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 51 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2024-10-11 14:34:05,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 322 flow [2024-10-11 14:34:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:34:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:34:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-10-11 14:34:05,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-10-11 14:34:05,525 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 128 flow. Second operand 6 states and 77 transitions. [2024-10-11 14:34:05,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 322 flow [2024-10-11 14:34:05,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 312 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:34:05,528 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 147 flow [2024-10-11 14:34:05,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-10-11 14:34:05,529 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2024-10-11 14:34:05,529 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 147 flow [2024-10-11 14:34:05,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:05,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:05,531 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:05,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:34:05,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:05,732 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:05,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1624933821, now seen corresponding path program 1 times [2024-10-11 14:34:05,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:05,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587142843] [2024-10-11 14:34:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587142843] [2024-10-11 14:34:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587142843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:05,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711336419] [2024-10-11 14:34:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:05,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:05,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:05,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:05,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:34:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:05,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:34:05,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:06,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:06,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711336419] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:06,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:06,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-11 14:34:06,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032427845] [2024-10-11 14:34:06,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:06,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:34:06,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:34:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:34:06,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:06,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 147 flow. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:06,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:06,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:06,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:06,364 INFO L124 PetriNetUnfolderBase]: 511/785 cut-off events. [2024-10-11 14:34:06,365 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2024-10-11 14:34:06,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2300 conditions, 785 events. 511/785 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2727 event pairs, 333 based on Foata normal form. 22/807 useless extension candidates. Maximal degree in co-relation 1618. Up to 567 conditions per place. [2024-10-11 14:34:06,370 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 3 changer transitions 23/51 dead transitions. [2024-10-11 14:34:06,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 307 flow [2024-10-11 14:34:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:34:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:34:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2024-10-11 14:34:06,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-11 14:34:06,373 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 147 flow. Second operand 6 states and 72 transitions. [2024-10-11 14:34:06,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 307 flow [2024-10-11 14:34:06,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 14:34:06,377 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 118 flow [2024-10-11 14:34:06,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2024-10-11 14:34:06,379 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-10-11 14:34:06,380 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 118 flow [2024-10-11 14:34:06,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:06,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:06,380 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:06,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:06,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:06,581 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:06,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1150888765, now seen corresponding path program 2 times [2024-10-11 14:34:06,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25555089] [2024-10-11 14:34:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:06,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:06,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25555089] [2024-10-11 14:34:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25555089] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264888097] [2024-10-11 14:34:06,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:34:06,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:06,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:06,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:34:06,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:34:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:06,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:34:06,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:06,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:06,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264888097] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:06,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:34:06,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-10-11 14:34:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159193475] [2024-10-11 14:34:06,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:07,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:34:07,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:07,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:34:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:34:07,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:07,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 118 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:07,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:07,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:07,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:07,259 INFO L124 PetriNetUnfolderBase]: 517/765 cut-off events. [2024-10-11 14:34:07,260 INFO L125 PetriNetUnfolderBase]: For 710/710 co-relation queries the response was YES. [2024-10-11 14:34:07,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 765 events. 517/765 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2648 event pairs, 150 based on Foata normal form. 14/779 useless extension candidates. Maximal degree in co-relation 2324. Up to 379 conditions per place. [2024-10-11 14:34:07,266 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-10-11 14:34:07,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 66 transitions, 402 flow [2024-10-11 14:34:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:34:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:34:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-10-11 14:34:07,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41203703703703703 [2024-10-11 14:34:07,268 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 118 flow. Second operand 8 states and 89 transitions. [2024-10-11 14:34:07,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 66 transitions, 402 flow [2024-10-11 14:34:07,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 332 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-10-11 14:34:07,277 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 149 flow [2024-10-11 14:34:07,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=149, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-10-11 14:34:07,279 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-10-11 14:34:07,279 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 149 flow [2024-10-11 14:34:07,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:07,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:07,280 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:07,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:34:07,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 14:34:07,481 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:07,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash 274742385, now seen corresponding path program 3 times [2024-10-11 14:34:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:07,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319747335] [2024-10-11 14:34:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:07,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319747335] [2024-10-11 14:34:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319747335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235782096] [2024-10-11 14:34:07,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:34:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:07,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:07,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:34:07,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:34:07,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:07,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:34:07,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:07,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:07,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235782096] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:07,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:34:07,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-10-11 14:34:07,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734167223] [2024-10-11 14:34:07,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:07,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:34:07,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:34:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:34:07,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:07,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:07,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:07,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:07,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:08,164 INFO L124 PetriNetUnfolderBase]: 678/1006 cut-off events. [2024-10-11 14:34:08,164 INFO L125 PetriNetUnfolderBase]: For 907/907 co-relation queries the response was YES. [2024-10-11 14:34:08,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 1006 events. 678/1006 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3615 event pairs, 240 based on Foata normal form. 12/1018 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2024-10-11 14:34:08,172 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-10-11 14:34:08,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 447 flow [2024-10-11 14:34:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:34:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:34:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-10-11 14:34:08,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2024-10-11 14:34:08,174 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 149 flow. Second operand 8 states and 85 transitions. [2024-10-11 14:34:08,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 447 flow [2024-10-11 14:34:08,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 410 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-10-11 14:34:08,177 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 206 flow [2024-10-11 14:34:08,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-10-11 14:34:08,178 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2024-10-11 14:34:08,178 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 206 flow [2024-10-11 14:34:08,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:08,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:08,179 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:08,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:34:08,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:08,380 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:08,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1922043421, now seen corresponding path program 4 times [2024-10-11 14:34:08,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:08,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284039578] [2024-10-11 14:34:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284039578] [2024-10-11 14:34:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284039578] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355615363] [2024-10-11 14:34:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:34:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:08,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:08,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:34:08,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:34:08,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:08,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:34:08,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:08,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:08,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355615363] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:08,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:34:08,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2024-10-11 14:34:08,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582832156] [2024-10-11 14:34:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:08,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:34:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:34:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:34:08,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:08,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:08,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:08,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:08,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:09,116 INFO L124 PetriNetUnfolderBase]: 784/1168 cut-off events. [2024-10-11 14:34:09,116 INFO L125 PetriNetUnfolderBase]: For 1869/1869 co-relation queries the response was YES. [2024-10-11 14:34:09,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4080 conditions, 1168 events. 784/1168 cut-off events. For 1869/1869 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4424 event pairs, 319 based on Foata normal form. 14/1182 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2024-10-11 14:34:09,125 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-10-11 14:34:09,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 531 flow [2024-10-11 14:34:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:34:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:34:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-10-11 14:34:09,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-10-11 14:34:09,127 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 206 flow. Second operand 8 states and 87 transitions. [2024-10-11 14:34:09,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 531 flow [2024-10-11 14:34:09,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 488 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-10-11 14:34:09,133 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 303 flow [2024-10-11 14:34:09,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-10-11 14:34:09,134 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-10-11 14:34:09,134 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 303 flow [2024-10-11 14:34:09,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:09,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:09,134 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:09,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:34:09,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:34:09,336 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:09,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 17904049, now seen corresponding path program 5 times [2024-10-11 14:34:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:09,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013437955] [2024-10-11 14:34:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:09,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:09,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013437955] [2024-10-11 14:34:09,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013437955] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:09,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154184468] [2024-10-11 14:34:09,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:34:09,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:09,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:09,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:34:09,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:34:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:09,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:34:09,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:09,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:09,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154184468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:09,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:09,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-11 14:34:09,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62015271] [2024-10-11 14:34:09,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:09,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 14:34:09,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 14:34:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:34:09,700 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:09,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 303 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:09,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:09,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:09,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:10,305 INFO L124 PetriNetUnfolderBase]: 770/1154 cut-off events. [2024-10-11 14:34:10,305 INFO L125 PetriNetUnfolderBase]: For 3005/3005 co-relation queries the response was YES. [2024-10-11 14:34:10,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 1154 events. 770/1154 cut-off events. For 3005/3005 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4485 event pairs, 143 based on Foata normal form. 14/1168 useless extension candidates. Maximal degree in co-relation 4412. Up to 385 conditions per place. [2024-10-11 14:34:10,316 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 92 selfloop transitions, 72 changer transitions 0/165 dead transitions. [2024-10-11 14:34:10,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 165 transitions, 1348 flow [2024-10-11 14:34:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:34:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:34:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 187 transitions. [2024-10-11 14:34:10,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3645224171539961 [2024-10-11 14:34:10,318 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 303 flow. Second operand 19 states and 187 transitions. [2024-10-11 14:34:10,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 165 transitions, 1348 flow [2024-10-11 14:34:10,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 165 transitions, 1226 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-10-11 14:34:10,330 INFO L231 Difference]: Finished difference. Result has 66 places, 100 transitions, 840 flow [2024-10-11 14:34:10,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=840, PETRI_PLACES=66, PETRI_TRANSITIONS=100} [2024-10-11 14:34:10,332 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-10-11 14:34:10,332 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 100 transitions, 840 flow [2024-10-11 14:34:10,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:10,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:10,332 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:10,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:34:10,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:10,533 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:10,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1411334113, now seen corresponding path program 6 times [2024-10-11 14:34:10,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:10,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396010947] [2024-10-11 14:34:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:10,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:10,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:10,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396010947] [2024-10-11 14:34:10,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396010947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:10,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288123455] [2024-10-11 14:34:10,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:34:10,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:10,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:10,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:10,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:34:10,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:34:10,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:10,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:34:10,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:10,851 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288123455] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:34:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2024-10-11 14:34:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759049981] [2024-10-11 14:34:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:10,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:34:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:34:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:34:10,948 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:10,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 100 transitions, 840 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:10,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:10,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:10,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:11,248 INFO L124 PetriNetUnfolderBase]: 753/1119 cut-off events. [2024-10-11 14:34:11,248 INFO L125 PetriNetUnfolderBase]: For 3018/3018 co-relation queries the response was YES. [2024-10-11 14:34:11,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4779 conditions, 1119 events. 753/1119 cut-off events. For 3018/3018 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4205 event pairs, 234 based on Foata normal form. 12/1131 useless extension candidates. Maximal degree in co-relation 4741. Up to 806 conditions per place. [2024-10-11 14:34:11,258 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 85 selfloop transitions, 47 changer transitions 0/133 dead transitions. [2024-10-11 14:34:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 133 transitions, 1250 flow [2024-10-11 14:34:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:34:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:34:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-10-11 14:34:11,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39094650205761317 [2024-10-11 14:34:11,259 INFO L175 Difference]: Start difference. First operand has 66 places, 100 transitions, 840 flow. Second operand 9 states and 95 transitions. [2024-10-11 14:34:11,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 133 transitions, 1250 flow [2024-10-11 14:34:11,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 133 transitions, 1113 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-10-11 14:34:11,273 INFO L231 Difference]: Finished difference. Result has 70 places, 104 transitions, 848 flow [2024-10-11 14:34:11,273 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=848, PETRI_PLACES=70, PETRI_TRANSITIONS=104} [2024-10-11 14:34:11,274 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2024-10-11 14:34:11,274 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 104 transitions, 848 flow [2024-10-11 14:34:11,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:11,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:11,275 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:11,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:34:11,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:34:11,476 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:11,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1700439657, now seen corresponding path program 7 times [2024-10-11 14:34:11,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:11,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147921375] [2024-10-11 14:34:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147921375] [2024-10-11 14:34:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147921375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:11,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087329063] [2024-10-11 14:34:11,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:34:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:11,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:11,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:34:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:11,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:34:11,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:11,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087329063] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:11,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:34:11,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2024-10-11 14:34:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193373360] [2024-10-11 14:34:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:11,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:34:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:34:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:34:11,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:11,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 104 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:11,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:11,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:11,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:12,159 INFO L124 PetriNetUnfolderBase]: 736/1084 cut-off events. [2024-10-11 14:34:12,159 INFO L125 PetriNetUnfolderBase]: For 3262/3262 co-relation queries the response was YES. [2024-10-11 14:34:12,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4656 conditions, 1084 events. 736/1084 cut-off events. For 3262/3262 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3978 event pairs, 211 based on Foata normal form. 12/1096 useless extension candidates. Maximal degree in co-relation 4616. Up to 619 conditions per place. [2024-10-11 14:34:12,168 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 68 selfloop transitions, 51 changer transitions 0/120 dead transitions. [2024-10-11 14:34:12,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 1122 flow [2024-10-11 14:34:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:34:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:34:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-10-11 14:34:12,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2024-10-11 14:34:12,169 INFO L175 Difference]: Start difference. First operand has 70 places, 104 transitions, 848 flow. Second operand 8 states and 86 transitions. [2024-10-11 14:34:12,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 1122 flow [2024-10-11 14:34:12,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 120 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-10-11 14:34:12,179 INFO L231 Difference]: Finished difference. Result has 68 places, 100 transitions, 812 flow [2024-10-11 14:34:12,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=812, PETRI_PLACES=68, PETRI_TRANSITIONS=100} [2024-10-11 14:34:12,180 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-10-11 14:34:12,180 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 100 transitions, 812 flow [2024-10-11 14:34:12,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:12,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:12,181 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:12,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:34:12,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:12,382 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:12,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash -490160248, now seen corresponding path program 2 times [2024-10-11 14:34:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:12,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268758376] [2024-10-11 14:34:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:12,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268758376] [2024-10-11 14:34:12,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268758376] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:12,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343146921] [2024-10-11 14:34:12,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:34:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:12,478 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:12,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:34:12,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:34:12,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:12,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 14:34:12,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:12,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:34:12,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343146921] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:12,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:34:12,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-10-11 14:34:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589885963] [2024-10-11 14:34:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:34:12,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:34:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:34:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:34:12,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:12,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 812 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:12,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:12,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:12,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:12,859 INFO L124 PetriNetUnfolderBase]: 721/1054 cut-off events. [2024-10-11 14:34:12,860 INFO L125 PetriNetUnfolderBase]: For 3014/3014 co-relation queries the response was YES. [2024-10-11 14:34:12,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4336 conditions, 1054 events. 721/1054 cut-off events. For 3014/3014 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3831 event pairs, 207 based on Foata normal form. 70/1124 useless extension candidates. Maximal degree in co-relation 4296. Up to 816 conditions per place. [2024-10-11 14:34:12,867 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 114 selfloop transitions, 11 changer transitions 0/126 dead transitions. [2024-10-11 14:34:12,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 1259 flow [2024-10-11 14:34:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:34:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:34:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-10-11 14:34:12,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3765432098765432 [2024-10-11 14:34:12,868 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 812 flow. Second operand 6 states and 61 transitions. [2024-10-11 14:34:12,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 1259 flow [2024-10-11 14:34:12,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 126 transitions, 1135 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-11 14:34:12,878 INFO L231 Difference]: Finished difference. Result has 67 places, 101 transitions, 750 flow [2024-10-11 14:34:12,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=750, PETRI_PLACES=67, PETRI_TRANSITIONS=101} [2024-10-11 14:34:12,879 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2024-10-11 14:34:12,879 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 101 transitions, 750 flow [2024-10-11 14:34:12,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:12,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:12,880 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:12,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:34:13,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:34:13,085 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:13,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash -741052655, now seen corresponding path program 1 times [2024-10-11 14:34:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872065225] [2024-10-11 14:34:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:14,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:14,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872065225] [2024-10-11 14:34:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872065225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:14,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066462852] [2024-10-11 14:34:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:14,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:14,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:14,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:14,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:34:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:14,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 14:34:14,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:14,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:34:15,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:15,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-10-11 14:34:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:15,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:17,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-10-11 14:34:17,166 INFO L349 Elim1Store]: treesize reduction 23, result has 34.3 percent of original size [2024-10-11 14:34:17,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 95 [2024-10-11 14:34:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-10-11 14:34:17,236 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-10-11 14:34:17,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 1 [2024-10-11 14:34:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:17,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066462852] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:17,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:17,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-11 14:34:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56767294] [2024-10-11 14:34:17,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:17,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 14:34:17,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 14:34:17,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-10-11 14:34:17,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:17,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 101 transitions, 750 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:17,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:17,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:17,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:20,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 14:34:21,428 INFO L124 PetriNetUnfolderBase]: 1831/2662 cut-off events. [2024-10-11 14:34:21,428 INFO L125 PetriNetUnfolderBase]: For 6876/6876 co-relation queries the response was YES. [2024-10-11 14:34:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11424 conditions, 2662 events. 1831/2662 cut-off events. For 6876/6876 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 11615 event pairs, 197 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 7529. Up to 1051 conditions per place. [2024-10-11 14:34:21,458 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 261 selfloop transitions, 120 changer transitions 1/383 dead transitions. [2024-10-11 14:34:21,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 383 transitions, 3648 flow [2024-10-11 14:34:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 14:34:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 14:34:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 185 transitions. [2024-10-11 14:34:21,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-10-11 14:34:21,460 INFO L175 Difference]: Start difference. First operand has 67 places, 101 transitions, 750 flow. Second operand 14 states and 185 transitions. [2024-10-11 14:34:21,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 383 transitions, 3648 flow [2024-10-11 14:34:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 383 transitions, 3612 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-11 14:34:21,495 INFO L231 Difference]: Finished difference. Result has 82 places, 197 transitions, 1966 flow [2024-10-11 14:34:21,497 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1966, PETRI_PLACES=82, PETRI_TRANSITIONS=197} [2024-10-11 14:34:21,498 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-10-11 14:34:21,498 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 197 transitions, 1966 flow [2024-10-11 14:34:21,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:21,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:21,499 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:21,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:34:21,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 14:34:21,700 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:21,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash 640483030, now seen corresponding path program 1 times [2024-10-11 14:34:21,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:21,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288938866] [2024-10-11 14:34:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:22,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:22,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288938866] [2024-10-11 14:34:22,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288938866] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:22,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572729326] [2024-10-11 14:34:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:22,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:22,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:22,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:34:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:22,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:34:22,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:23,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:23,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-10-11 14:34:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:23,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:23,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:23,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 127 [2024-10-11 14:34:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572729326] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:24,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:24,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-10-11 14:34:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712292015] [2024-10-11 14:34:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:24,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:34:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:34:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:34:24,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:24,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 197 transitions, 1966 flow. Second operand has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:24,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:24,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:24,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:25,021 INFO L124 PetriNetUnfolderBase]: 2303/3319 cut-off events. [2024-10-11 14:34:25,021 INFO L125 PetriNetUnfolderBase]: For 12442/12442 co-relation queries the response was YES. [2024-10-11 14:34:25,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16427 conditions, 3319 events. 2303/3319 cut-off events. For 12442/12442 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14786 event pairs, 309 based on Foata normal form. 2/3321 useless extension candidates. Maximal degree in co-relation 15127. Up to 2610 conditions per place. [2024-10-11 14:34:25,048 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 200 selfloop transitions, 140 changer transitions 1/342 dead transitions. [2024-10-11 14:34:25,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 342 transitions, 3955 flow [2024-10-11 14:34:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:34:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:34:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-10-11 14:34:25,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2024-10-11 14:34:25,050 INFO L175 Difference]: Start difference. First operand has 82 places, 197 transitions, 1966 flow. Second operand 10 states and 119 transitions. [2024-10-11 14:34:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 342 transitions, 3955 flow [2024-10-11 14:34:25,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 342 transitions, 3730 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-10-11 14:34:25,095 INFO L231 Difference]: Finished difference. Result has 91 places, 280 transitions, 3096 flow [2024-10-11 14:34:25,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3096, PETRI_PLACES=91, PETRI_TRANSITIONS=280} [2024-10-11 14:34:25,096 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-10-11 14:34:25,097 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 280 transitions, 3096 flow [2024-10-11 14:34:25,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:25,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:25,097 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:25,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:25,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:34:25,298 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:25,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:25,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2142795643, now seen corresponding path program 2 times [2024-10-11 14:34:25,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:25,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306365657] [2024-10-11 14:34:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:25,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:26,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306365657] [2024-10-11 14:34:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306365657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:26,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826666363] [2024-10-11 14:34:26,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:34:26,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:26,441 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:26,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:34:26,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:34:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:26,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-11 14:34:26,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:26,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:34:26,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:34:26,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:26,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-10-11 14:34:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:26,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826666363] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:27,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-10-11 14:34:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719310818] [2024-10-11 14:34:27,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:27,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:34:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:34:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:34:27,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:27,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 280 transitions, 3096 flow. Second operand has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 23 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:27,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:27,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:27,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:29,080 INFO L124 PetriNetUnfolderBase]: 2661/3903 cut-off events. [2024-10-11 14:34:29,081 INFO L125 PetriNetUnfolderBase]: For 18094/18094 co-relation queries the response was YES. [2024-10-11 14:34:29,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20878 conditions, 3903 events. 2661/3903 cut-off events. For 18094/18094 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18616 event pairs, 274 based on Foata normal form. 2/3905 useless extension candidates. Maximal degree in co-relation 19471. Up to 3117 conditions per place. [2024-10-11 14:34:29,107 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 258 selfloop transitions, 141 changer transitions 1/401 dead transitions. [2024-10-11 14:34:29,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 401 transitions, 4915 flow [2024-10-11 14:34:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:34:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:34:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 162 transitions. [2024-10-11 14:34:29,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-11 14:34:29,111 INFO L175 Difference]: Start difference. First operand has 91 places, 280 transitions, 3096 flow. Second operand 15 states and 162 transitions. [2024-10-11 14:34:29,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 401 transitions, 4915 flow [2024-10-11 14:34:29,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 401 transitions, 4856 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-10-11 14:34:29,197 INFO L231 Difference]: Finished difference. Result has 107 places, 333 transitions, 4049 flow [2024-10-11 14:34:29,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4049, PETRI_PLACES=107, PETRI_TRANSITIONS=333} [2024-10-11 14:34:29,197 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2024-10-11 14:34:29,198 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 333 transitions, 4049 flow [2024-10-11 14:34:29,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 23 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:29,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:29,198 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:29,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:29,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:29,399 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:29,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1219933075, now seen corresponding path program 3 times [2024-10-11 14:34:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:29,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483158615] [2024-10-11 14:34:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:30,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483158615] [2024-10-11 14:34:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483158615] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122152225] [2024-10-11 14:34:30,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:34:30,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:30,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:30,496 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:30,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:34:30,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:34:30,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:30,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-11 14:34:30,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:30,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:34:30,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:34:30,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:30,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-10-11 14:34:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:31,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:36,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2024-10-11 14:34:36,704 INFO L349 Elim1Store]: treesize reduction 23, result has 34.3 percent of original size [2024-10-11 14:34:36,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1273 treesize of output 1092 [2024-10-11 14:34:36,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 88 [2024-10-11 14:34:36,787 INFO L349 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2024-10-11 14:34:36,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1319 treesize of output 1 [2024-10-11 14:34:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:36,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122152225] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:36,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:34:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651964101] [2024-10-11 14:34:36,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:36,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:34:36,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:34:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=436, Unknown=1, NotChecked=0, Total=552 [2024-10-11 14:34:36,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:36,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 333 transitions, 4049 flow. Second operand has 24 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:36,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:36,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:36,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:41,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 14:34:45,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 14:34:49,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 14:34:51,319 INFO L124 PetriNetUnfolderBase]: 3317/4816 cut-off events. [2024-10-11 14:34:51,319 INFO L125 PetriNetUnfolderBase]: For 26556/26556 co-relation queries the response was YES. [2024-10-11 14:34:51,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27190 conditions, 4816 events. 3317/4816 cut-off events. For 26556/26556 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23487 event pairs, 343 based on Foata normal form. 3/4819 useless extension candidates. Maximal degree in co-relation 26657. Up to 1811 conditions per place. [2024-10-11 14:34:51,356 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 399 selfloop transitions, 263 changer transitions 3/666 dead transitions. [2024-10-11 14:34:51,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 666 transitions, 8591 flow [2024-10-11 14:34:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 14:34:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 14:34:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 301 transitions. [2024-10-11 14:34:51,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48470209339774556 [2024-10-11 14:34:51,359 INFO L175 Difference]: Start difference. First operand has 107 places, 333 transitions, 4049 flow. Second operand 23 states and 301 transitions. [2024-10-11 14:34:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 666 transitions, 8591 flow [2024-10-11 14:34:51,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 666 transitions, 8299 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-10-11 14:34:51,508 INFO L231 Difference]: Finished difference. Result has 135 places, 426 transitions, 5581 flow [2024-10-11 14:34:51,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5581, PETRI_PLACES=135, PETRI_TRANSITIONS=426} [2024-10-11 14:34:51,509 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2024-10-11 14:34:51,509 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 426 transitions, 5581 flow [2024-10-11 14:34:51,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:51,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:51,510 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:51,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 14:34:51,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:34:51,715 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:51,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash -210509660, now seen corresponding path program 2 times [2024-10-11 14:34:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:51,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714009848] [2024-10-11 14:34:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:51,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:52,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714009848] [2024-10-11 14:34:52,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714009848] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:52,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865665661] [2024-10-11 14:34:52,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:34:52,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:52,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:52,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:34:52,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:34:52,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:52,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:34:52,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:52,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:52,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2024-10-11 14:34:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:52,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:53,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:53,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 130 [2024-10-11 14:34:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865665661] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:53,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:53,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-10-11 14:34:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519783484] [2024-10-11 14:34:53,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:53,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:34:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:34:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:34:53,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:53,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 426 transitions, 5581 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:53,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:53,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:53,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:55,194 INFO L124 PetriNetUnfolderBase]: 3887/5628 cut-off events. [2024-10-11 14:34:55,194 INFO L125 PetriNetUnfolderBase]: For 39244/39244 co-relation queries the response was YES. [2024-10-11 14:34:55,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35169 conditions, 5628 events. 3887/5628 cut-off events. For 39244/39244 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28160 event pairs, 320 based on Foata normal form. 2/5630 useless extension candidates. Maximal degree in co-relation 34551. Up to 4042 conditions per place. [2024-10-11 14:34:55,236 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 286 selfloop transitions, 307 changer transitions 1/595 dead transitions. [2024-10-11 14:34:55,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 595 transitions, 8623 flow [2024-10-11 14:34:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:34:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:34:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-10-11 14:34:55,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-10-11 14:34:55,238 INFO L175 Difference]: Start difference. First operand has 135 places, 426 transitions, 5581 flow. Second operand 10 states and 128 transitions. [2024-10-11 14:34:55,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 595 transitions, 8623 flow [2024-10-11 14:34:55,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 595 transitions, 8203 flow, removed 146 selfloop flow, removed 7 redundant places. [2024-10-11 14:34:55,464 INFO L231 Difference]: Finished difference. Result has 141 places, 506 transitions, 7172 flow [2024-10-11 14:34:55,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7172, PETRI_PLACES=141, PETRI_TRANSITIONS=506} [2024-10-11 14:34:55,465 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2024-10-11 14:34:55,465 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 506 transitions, 7172 flow [2024-10-11 14:34:55,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:55,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:55,466 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:55,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 14:34:55,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:34:55,670 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:55,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1485351290, now seen corresponding path program 3 times [2024-10-11 14:34:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:55,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151213625] [2024-10-11 14:34:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:34:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:34:56,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:34:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151213625] [2024-10-11 14:34:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151213625] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:34:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275512974] [2024-10-11 14:34:56,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:34:56,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:34:56,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:34:56,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:34:56,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:34:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:34:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:34:56,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:34:56,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:34:56,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:56,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-10-11 14:34:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:56,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:34:57,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:34:57,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 127 [2024-10-11 14:34:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:34:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275512974] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:34:57,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:34:57,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-10-11 14:34:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113940795] [2024-10-11 14:34:57,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:34:57,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:34:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:34:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:34:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:34:57,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:34:57,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 506 transitions, 7172 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:57,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:34:57,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:34:57,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:34:58,796 INFO L124 PetriNetUnfolderBase]: 4069/5894 cut-off events. [2024-10-11 14:34:58,796 INFO L125 PetriNetUnfolderBase]: For 47969/47969 co-relation queries the response was YES. [2024-10-11 14:34:58,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38610 conditions, 5894 events. 4069/5894 cut-off events. For 47969/47969 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29695 event pairs, 505 based on Foata normal form. 2/5896 useless extension candidates. Maximal degree in co-relation 38012. Up to 5130 conditions per place. [2024-10-11 14:34:58,834 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 410 selfloop transitions, 177 changer transitions 1/589 dead transitions. [2024-10-11 14:34:58,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 589 transitions, 9204 flow [2024-10-11 14:34:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:34:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:34:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-10-11 14:34:58,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2024-10-11 14:34:58,836 INFO L175 Difference]: Start difference. First operand has 141 places, 506 transitions, 7172 flow. Second operand 10 states and 122 transitions. [2024-10-11 14:34:58,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 589 transitions, 9204 flow [2024-10-11 14:34:59,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 589 transitions, 8943 flow, removed 127 selfloop flow, removed 3 redundant places. [2024-10-11 14:34:59,061 INFO L231 Difference]: Finished difference. Result has 151 places, 522 transitions, 7725 flow [2024-10-11 14:34:59,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7725, PETRI_PLACES=151, PETRI_TRANSITIONS=522} [2024-10-11 14:34:59,062 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-10-11 14:34:59,062 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 522 transitions, 7725 flow [2024-10-11 14:34:59,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:34:59,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:34:59,062 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:34:59,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 14:34:59,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:34:59,263 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:34:59,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:34:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2111989887, now seen corresponding path program 4 times [2024-10-11 14:34:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:34:59,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237820675] [2024-10-11 14:34:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:34:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:34:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:00,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:00,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237820675] [2024-10-11 14:35:00,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237820675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:00,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50262342] [2024-10-11 14:35:00,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:35:00,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:00,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:00,322 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:00,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:35:00,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:35:00,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:00,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 14:35:00,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:00,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:35:00,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:00,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-10-11 14:35:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:00,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:02,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50262342] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:02,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:02,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2024-10-11 14:35:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127891416] [2024-10-11 14:35:02,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:02,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 14:35:02,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 14:35:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-10-11 14:35:02,171 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:35:02,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 522 transitions, 7725 flow. Second operand has 28 states, 28 states have (on average 6.321428571428571) internal successors, (177), 28 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:02,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:02,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:35:02,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:04,127 INFO L124 PetriNetUnfolderBase]: 4399/6394 cut-off events. [2024-10-11 14:35:04,127 INFO L125 PetriNetUnfolderBase]: For 55044/55044 co-relation queries the response was YES. [2024-10-11 14:35:04,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42539 conditions, 6394 events. 4399/6394 cut-off events. For 55044/55044 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32950 event pairs, 433 based on Foata normal form. 4/6398 useless extension candidates. Maximal degree in co-relation 41927. Up to 4678 conditions per place. [2024-10-11 14:35:04,176 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 306 selfloop transitions, 333 changer transitions 2/642 dead transitions. [2024-10-11 14:35:04,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 642 transitions, 10202 flow [2024-10-11 14:35:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:35:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:35:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 177 transitions. [2024-10-11 14:35:04,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-10-11 14:35:04,177 INFO L175 Difference]: Start difference. First operand has 151 places, 522 transitions, 7725 flow. Second operand 15 states and 177 transitions. [2024-10-11 14:35:04,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 642 transitions, 10202 flow [2024-10-11 14:35:04,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 642 transitions, 9761 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-10-11 14:35:04,440 INFO L231 Difference]: Finished difference. Result has 164 places, 553 transitions, 8509 flow [2024-10-11 14:35:04,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7306, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8509, PETRI_PLACES=164, PETRI_TRANSITIONS=553} [2024-10-11 14:35:04,441 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2024-10-11 14:35:04,441 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 553 transitions, 8509 flow [2024-10-11 14:35:04,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.321428571428571) internal successors, (177), 28 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:04,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:04,441 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:04,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:04,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:04,642 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:35:04,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -490545825, now seen corresponding path program 5 times [2024-10-11 14:35:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:04,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078471036] [2024-10-11 14:35:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:05,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:05,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078471036] [2024-10-11 14:35:05,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078471036] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:05,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204157621] [2024-10-11 14:35:05,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:35:05,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:05,706 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:05,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:35:05,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:05,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-11 14:35:05,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:05,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:35:05,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:35:06,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:06,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2024-10-11 14:35:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:06,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204157621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:07,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 27 [2024-10-11 14:35:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628648323] [2024-10-11 14:35:07,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:07,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 14:35:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 14:35:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-10-11 14:35:07,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:35:07,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 553 transitions, 8509 flow. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:07,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:07,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:35:07,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:10,099 INFO L124 PetriNetUnfolderBase]: 4540/6608 cut-off events. [2024-10-11 14:35:10,100 INFO L125 PetriNetUnfolderBase]: For 60109/60109 co-relation queries the response was YES. [2024-10-11 14:35:10,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44658 conditions, 6608 events. 4540/6608 cut-off events. For 60109/60109 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34467 event pairs, 519 based on Foata normal form. 3/6611 useless extension candidates. Maximal degree in co-relation 44011. Up to 4937 conditions per place. [2024-10-11 14:35:10,160 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 330 selfloop transitions, 390 changer transitions 1/722 dead transitions. [2024-10-11 14:35:10,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 722 transitions, 11620 flow [2024-10-11 14:35:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 14:35:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 14:35:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 316 transitions. [2024-10-11 14:35:10,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40357598978288634 [2024-10-11 14:35:10,161 INFO L175 Difference]: Start difference. First operand has 164 places, 553 transitions, 8509 flow. Second operand 29 states and 316 transitions. [2024-10-11 14:35:10,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 722 transitions, 11620 flow [2024-10-11 14:35:10,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 722 transitions, 11128 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-10-11 14:35:10,469 INFO L231 Difference]: Finished difference. Result has 192 places, 597 transitions, 9725 flow [2024-10-11 14:35:10,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9725, PETRI_PLACES=192, PETRI_TRANSITIONS=597} [2024-10-11 14:35:10,470 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-10-11 14:35:10,470 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 597 transitions, 9725 flow [2024-10-11 14:35:10,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:10,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:10,471 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:10,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:10,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:10,671 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:35:10,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1145518179, now seen corresponding path program 6 times [2024-10-11 14:35:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471015028] [2024-10-11 14:35:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:11,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:11,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471015028] [2024-10-11 14:35:11,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471015028] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:11,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543912043] [2024-10-11 14:35:11,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:35:11,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:11,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:11,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:11,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 14:35:11,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:35:11,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:11,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-11 14:35:11,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:11,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:35:11,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:35:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 14:35:12,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:12,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 56 [2024-10-11 14:35:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:12,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:13,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543912043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:13,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:13,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 27 [2024-10-11 14:35:13,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048352845] [2024-10-11 14:35:13,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:13,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 14:35:13,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 14:35:13,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2024-10-11 14:35:13,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:35:13,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 597 transitions, 9725 flow. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:13,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:13,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:35:13,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:15,517 INFO L124 PetriNetUnfolderBase]: 5130/7467 cut-off events. [2024-10-11 14:35:15,517 INFO L125 PetriNetUnfolderBase]: For 72556/72556 co-relation queries the response was YES. [2024-10-11 14:35:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53248 conditions, 7467 events. 5130/7467 cut-off events. For 72556/72556 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 39855 event pairs, 612 based on Foata normal form. 2/7469 useless extension candidates. Maximal degree in co-relation 52546. Up to 6135 conditions per place. [2024-10-11 14:35:15,580 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 456 selfloop transitions, 399 changer transitions 1/857 dead transitions. [2024-10-11 14:35:15,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 857 transitions, 14947 flow [2024-10-11 14:35:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 14:35:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 14:35:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 298 transitions. [2024-10-11 14:35:15,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-10-11 14:35:15,582 INFO L175 Difference]: Start difference. First operand has 192 places, 597 transitions, 9725 flow. Second operand 28 states and 298 transitions. [2024-10-11 14:35:15,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 857 transitions, 14947 flow [2024-10-11 14:35:15,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 857 transitions, 14509 flow, removed 79 selfloop flow, removed 10 redundant places. [2024-10-11 14:35:15,962 INFO L231 Difference]: Finished difference. Result has 218 places, 767 transitions, 13471 flow [2024-10-11 14:35:15,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13471, PETRI_PLACES=218, PETRI_TRANSITIONS=767} [2024-10-11 14:35:15,963 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2024-10-11 14:35:15,963 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 767 transitions, 13471 flow [2024-10-11 14:35:15,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 27 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:15,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:15,963 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:15,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:16,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:16,164 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 14:35:16,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1096016408, now seen corresponding path program 4 times [2024-10-11 14:35:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:16,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653134571] [2024-10-11 14:35:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:16,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:17,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:17,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653134571] [2024-10-11 14:35:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653134571] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:17,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604892599] [2024-10-11 14:35:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:35:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:17,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:17,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 14:35:17,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:35:17,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:17,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:35:17,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:17,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:17,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 32 [2024-10-11 14:35:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:17,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:17,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:35:17,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 130 [2024-10-11 14:35:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:18,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604892599] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:18,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:18,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-10-11 14:35:18,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112383739] [2024-10-11 14:35:18,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:18,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:35:18,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:35:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:35:18,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-10-11 14:35:18,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 767 transitions, 13471 flow. Second operand has 20 states, 20 states have (on average 7.1) internal successors, (142), 20 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:18,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:18,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-10-11 14:35:18,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand